| 壳聚糖固定化枯草芽孢杆菌水溶液中铜离子的吸附(英文) |
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| 引用本文： | 刘云国,廖婷,贺仲兵,李婷婷,王慧,胡新将,郭一明,何缘.壳聚糖固定化枯草芽孢杆菌水溶液中铜离子的吸附(英文)[J].中国有色金属学会会刊,2013,23(6):1804-1814. |
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| 作者姓名： | 刘云国 廖婷 贺仲兵 李婷婷 王慧 胡新将 郭一明 何缘 |
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| 作者单位： | 湖南大学环境科学与工程学院;湖南大学环境生物与控制教育部重点实验室 |
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| 基金项目： | Project(11JJ2031)supported by the Key Project of Natural Science Foundation of Hunan Province,China;Project(2009SK3029)supported by the Plan Science and Technology Department of Hunan Province,China |
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| 摘 要： | 研究了壳聚糖固定化枯草芽孢杆菌吸附铜离子的性能,分析了pH、吸附剂投加量、温度、铜离子初始浓度和时间对铜离子吸附的影响。结果表明,pH对铜离子的吸附有较大的影响。此外,固定化枯草芽孢杆菌吸附剂比空白吸附剂具有更强的吸附性能。整个吸附过程符合朗缪尔吸附模型(R2=0.994),最大吸附量为100.70mg/L。动力学模型拟合结果表明,实验符合准二级动力学模型,线性相关指数大于0.999。吸附剂能在0.1mol/LNaOH溶液中被成功解吸。
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| 关 键 词： | 生物吸附 枯草芽孢杆菌 固定化枯草芽孢杆菌 Cu(Ⅱ) 吸附平衡 动力学 |
| 收稿时间： | 10 May 2012 |
Biosorption of copper(II) from aqueous solution by Bacillus subtilis cells immobilized into chitosan beads |
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| Yun-guo LIU,Ting LIAO,Zhong-bing HE,Ting-ting LI,Hui WANG,Xin-jiang HU,Yi-ming GUO,Yuan HE.Biosorption of copper(II) from aqueous solution by Bacillus subtilis cells immobilized into chitosan beads[J].Transactions of Nonferrous Metals Society of China,2013,23(6):1804-1814. |
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| Authors: | Yun-guo LIU Ting LIAO Zhong-bing HE Ting-ting LI Hui WANG Xin-jiang HU Yi-ming GUO Yuan HE |
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| Affiliation: | 1,2 1.College of Environmental Science and Engineering,Hunan University,Changsha 410082,China;2.Key Laboratory of Environmental Biology and Pollution Control of Ministry of Education,Hunan University,Changsha 410082,China |
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| Abstract: | The ability of Bacillus subtilis immobilized into chitosan beads (BICB) to remove Cu(II) from aqueous solution was studied. The effects of pH, biosorbent dosage, temperature, initial Cu(II) concentration and contact time on removal of Cu(II) were studied using batch adsorption experiments. The results show that the Cu(II) absorption strongly depends on pH and the optimum pH is 6. Compared with chitosan beads (CB), the BICB has higher efficiency and capacity on Cu(II) removal. The Langmuir isotherm model (R2=0.994) is proved to fit the equilibrium data best. The maximum adsorption capacity determined from Langmuir model is 100.70 mg/g. The kinetic data fit well with the pseudo-second-order model and the correlation coefficient is greater than 0.999. The biosorbents are successfully regenerated using 0.1 mol/L NaOH solution. |
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| Keywords: | biosorption Bacillus subtilis Cu(II) isotherms kinetic |
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